株洲二线船闸引航道平面布置方案及水流条件分析
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摘要
针对株洲一线船闸与二线船闸引航道之间相互影响的问题,对平面布置方案进行分析比选,推荐直进曲出的布置方案。针对上游隔流堤末端存在流速较大及回流区的问题,提出二线船闸引航道挖深范围向上游延长60. 0 m、并在隔流堤末端加设透水式隔流墩的布置措施。通过模型试验对引航道水流条件进行分析得知,二线船闸泄水对一线船闸下闸首人字门附近产生的最大瞬时反向水头较大(0. 389 m),超过规范允许值(0. 25 m)。为此提出人字门启闭系统设计时加设锁定装置并在运行管理过程中加强观测的改善措施。
Aiming at the problem of mutual influence between Zhuzhou first-lane lock and second-lane lock approach channel,we analyze the selection process of plane layout scheme and recommend the layout scheme of straight in and curved out. To counter the large velocity and recirculating zone at the end of the upstream dike,we put forward the layout measures of extending the excavation depth of the second-lane lock's approach channel to the upstream by 60. 0 m and installing pervious piers at the end of the dike. The analyzing result of the approach channel' s flow condition based on the model experiment reveals that the maximum instantaneous reverse water head( 0. 389 m) near the miter gate of the lower lock head of the first-lane lock is larger when the second-lane lock is discharged, exceeding the allowable value of specification( 0. 25 m). The improvement measures of installing locking device in the design of miter gate opening and closing system and strengthening observation during operation and management are put forward.
Aiming at the problem of mutual influence between Zhuzhou first-lane lock and second-lane lock approach channel,we analyze the selection process of plane layout scheme and recommend the layout scheme of straight in and curved out. To counter the large velocity and recirculating zone at the end of the upstream dike,we put forward the layout measures of extending the excavation depth of the second-lane lock's approach channel to the upstream by 60. 0 m and installing pervious piers at the end of the dike. The analyzing result of the approach channel' s flow condition based on the model experiment reveals that the maximum instantaneous reverse water head( 0. 389 m) near the miter gate of the lower lock head of the first-lane lock is larger when the second-lane lock is discharged, exceeding the allowable value of specification( 0. 25 m). The improvement measures of installing locking device in the design of miter gate opening and closing system and strengthening observation during operation and management are put forward.
引文
[1]中交水运规划设计院有限公司.湘江二级航道二期工程初步设计[R].北京:中交水运规划设计院有限公司,2015.
[2]中交水运规划设计院.船闸总体设计规范:JTJ 305—2001[S].北京:人民交通出版社,2002.
[3]南京水利科学研究院.株洲航电枢纽二线船闸工程引航道水流条件研究报告[R].南京:南京水利科学研究院,2015.
[2]中交水运规划设计院.船闸总体设计规范:JTJ 305—2001[S].北京:人民交通出版社,2002.
[3]南京水利科学研究院.株洲航电枢纽二线船闸工程引航道水流条件研究报告[R].南京:南京水利科学研究院,2015.